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Anomalous diffusion analysis of semantic evolution in major Indo-European languages

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  • Bogdán Asztalos
  • Gergely Palla
  • Dániel Czégel

Abstract

How do words change their meaning? Although semantic evolution is driven by a variety of distinct factors, including linguistic, societal, and technological ones, we find that there is one law that holds universally across five major Indo-European languages: that semantic evolution is subdiffusive. Using an automated pipeline of diachronic distributional semantic embedding that controls for underlying symmetries, we show that words follow stochastic trajectories in meaning space with an anomalous diffusion exponent α = 0.45 ± 0.05 across languages, in contrast with diffusing particles that follow α = 1. Randomization methods indicate that preserving temporal correlations in semantic change directions is necessary to recover strongly subdiffusive behavior; however, correlations in change sizes play an important role too. We furthermore show that strong subdiffusion is a robust phenomenon under a wide variety of choices in data analysis and interpretation, such as the choice of fitting an ensemble average of displacements or averaging best-fit exponents of individual word trajectories.

Suggested Citation

  • Bogdán Asztalos & Gergely Palla & Dániel Czégel, 2024. "Anomalous diffusion analysis of semantic evolution in major Indo-European languages," PLOS ONE, Public Library of Science, vol. 19(3), pages 1-18, March.
    • Handle: RePEc:plo:pone00:0298650
    DOI: 10.1371/journal.pone.0298650
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    1. Erez Lieberman & Jean-Baptiste Michel & Joe Jackson & Tina Tang & Martin A. Nowak, 2007. "Quantifying the evolutionary dynamics of language," Nature, Nature, vol. 449(7163), pages 713-716, October.
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